Lincoln Electric IM355-C LN-9 GMA - Manual (Page 60)

TROUbLESHOOTING
E-6 E-6
LN-9 GMA and LN-9F GMA Wire Feeder
PRObLEMS
(SYMPTOMS)
Variable or "hunting" arc.
POSSIbLE AREAS OF
MISADJUSTMENT(S)
1. Check for worn or incorrect sized
contact tip. Replace tip if
necessary.
2. Check for worn or undersized
work cables. Repair or replace if
necessary.
3. Check for loose electrode
connections. Be sure the
following connections are tight:
Electrode cable to wire feeder
and power source, work cable to
power source and work, gun
cable to wire feeder contact
block, gun nozzle to body, and
contact tip to nozzle.
4. Check whether the Voltage
Control Response is properly set
for the power source and the
process. See the topic “Voltage
Control Response”
in the
Operation section.
RECOMMENDED
COURSE OF ACTION
If all recommended possible
areas of misadjustment have
been checked and the problem
persists, contact your local
Lincoln Authorized Field Service
Facility.
If for any reason you do not understand the test procedures or are unable to perform the necessary tests/repairs
safely, contact your local authorized field service facility before you proceed.
WELDING PRObLEMS
CAUTION
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUbLESHOOTING GUIDE